Improvement in treadles for sewing-machines



N. & c. nuBnuL.

Treadles for Sewing-Machines.

Nol46,994, Patented Feb.3.1a74.-

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Ataken on the line a: a: of said f1 gure.

UNITED STATES PATENT OFFICEo NAPOLEON DUBRUL, OF CINCINNATI, OHIO, ANI) CYRIAC DUBRUL, OF

CHICAGO, ILLINOIS.

IMPROVEMENT IN TREADLES FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 146,991, dated February 3, 1874; application ied July l5, 1873.

To all whom lit may concern:

Be it known that we, NAPOLEON DUBRUL, of Cincinnati, Ohio, and CYR-IAC DUBRUL, of

. Chicago, Illinois,` have invented certa-in Improvements in Treadles, of which the following is a specicatiou:

In the accompanying drawings, whichform a part of this specification, Figure l is a front elevation of a stand or table-as, for instance, a sewing-machine stand-tted with our improved treadle. Fig. 2 is an end elevation of saine. Fig. 3 is a vertical section of the foot or rock shaft, enlarged from Fig. 2, Fig. 4is a face view of one of the outside loose pulleys, showing the friction-ratchet. Fig. 5 is a central transverse vertical section through the entire set of loose and fast pulleys; the three latter gures being enlarged from Figs. 1 and 2.

Lilie letters of reference made use oi' in the several figures indicate like parts.

In the said drawings, A represents the treadleshaft, and B the pulleyshai't. Upon this treadle-shaft A is placed a loose tube or sleeve, C, secured from slipping longitudinally by means of the collars c c, which are secured f o the shaft by set-screws, or in some other way. Attached rigidly to this tube or sleeve C are the treadlel) for the left foot, and the arm'E, to which arm the ends of the belt or strap are fastened. VThe treadle D for the right foot is placed loosely upon the sleeve, and moves or rocks upon it. The other ends ot' the belt or strap are fastened to this treadle D', as shown. This arrangement of treadle, sleeve, arm, Ste., obviates the necessity ot' crossing the belt, and makes a strong, dura ble contriva-nee.

Short sleeves c c are slipped over the tube or sleeve C, between the treadles and arm,

to keep them asunder. G is a pulley, which we term the tight pulley,7 as it is rigidly fastened to the shaft B. This pulley G is made with a'cavity or recess, b, at each side or face. Inclosing this tight pulley are two or bar m to one of these lugs, may be removed and transferred to the other lug, presenting a new corner oi' the caln for the pawl to wear against, it only being necessary to turn the entire pulley around upon the shaft, so that the ratchet device will operate in a proper direction. This cam 1'., when the loose pulley is revolved in one direction, takes against the. side of the pawl or bar m, and forces it into contact with the sides of the pulley, so that the` tight pulley and its shaft takes the revolution, while in going the other or reverse way the said pawl slides upon the said surface, and allows. the loose pulleys to niove without causing any motion of the tight pulley, as will be readily understood. The belt or band J is attached to the point right of the angle projection f of the arin E, passing from thence over one half, H', of the loose pulley; thence down to the point of the right-angled projection d of the arm D', thence over the other half ot' the loose pulley, and down to the angle of the arm Il, where it is connected. This arrangement of the belt gives the necessary alternating act-ion of the. belt upon the pulley, causing the downward pressure oi the treadle to actuate in one direction alternately the two halves II H of the loose pulley, producing a continuous rotation of thcshai't B. E v

Having thus fully described our invention, that which we claim as new, and desire to se cure by Letters Patent, is-

l. The combinatioirof the tight pulley G,

loose iuelosing); pulleysH H,band or strap J, 11er Ot' the oem is Worn the sp1-ing und pawl hendles l) D d, and 2mn Ef, constructed and may be reversed, as specified.

operntin substantially as specified.

m. 1 f 'r 2. rlhe Combination Of the shaft; A, pipe l" o1' sleeve C, to which are attached rigidly the needle l) and arm E, and the trezidle D', Witnesses is to NAPOLEON DUBRUL: lfitted to revolve loosely upon the sleeve C, F. A. SGHWILL, substantially as speeied. CEAS. P. TAFT.

The two lugs j j upon the hub h, pro- Witnesses as to CYRIAO DUBRUL: vided with the edm z', in combination with the JOHN W. MUNDAY, piwl m and spring k, so that when one eor- HEINRICH F. BRUNS. 

